Carbon-supported Fe/Co-N electrocatalysts synthesized through heat treatment of Fe/Co-doped polypyrrole-polyaniline composites for oxygen reduction reaction通过热处理Fe/Co掺杂的聚吡咯-聚苯胺复合材料合成的碳负载Fe/co-n电催化剂,用于氧还原反应SCIENCE CHINA-CHEMISTRYIF9.72013-12-0547PREAI